Box-forming machine.



No. 837,325. PATENTED D1304, 1906. J. H. MITCHELL.

BOX FORMING MACHINE.

APPLIUATION FILED MAR. e. 1905.

6 SHEETS-SEEET 1- PATENTED DEC. 4, 1906.

J. H. MITCHELL.

BOX FORMING MACHINE.

' APPLICATION FILED MAB. a, 1906.

8 SHEETS-SHEET 2- |||I| vllC FIII IN VE IV 70/? WI TNESSES wW m PATENTED DEC. 4, 1906.

J. H. MITCHELL.

BOX FORMING MACHINE.

APPLICATION FILED MAR.8, 1905.

8 SHEETS-SHEET 3- INVE N TOR 4 4 TTORNEY.

wmvsssis PATENTED DEC. 4, 1906.

J. H. MITCHELL. BOX FORMING MACHINE.

APPLICATION FILED MAR. 8, 1905.

6 SHEETS-SHEET 4.

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5:: L INVENTOH ATTORNEY.

MAW

PATENTED DEC. 4, 1906.

J. H. MITCHELL. BOX FORMING MACHINE APPLICATION FILED MAE. B 1905.

6 SHEETS-SHEET 5.

a7 ZKEI VTUR m: J'Q/ ATTORNEY.

WITNESSES flg'ur No. 887,325. PATENTED DEC. 4, 1906.

J. H. MITCHELL.

BOX FORMING MACHINE.

APPLICATION FILED MAR. s. 1905.

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WITNESSES: 4 INVENZOR m 1M f $-Wga I M I A Q 1 ,1

A; A TTURNEV.

UNITE STATES PATENT OFFICE.

BOX-FORMING MACHINE.

Specification of Letters Patent.

Patented Dec. 1, 1906.

Application filed March 8, 1905. Serial No. 249.062.

lowing is a true and exact description, reference being bad to the accompanying drawings, which form a part thereo l/ly invention relates to mechanism for forming paper boxes, and is especially adapted for the manufacture of lined paper boxes or boxes consisting of an inner box or case of light material and an outer case of heavier material, though in some of its features my invention is applicable to machinery for making unlined boxes.

The object of my invention is to provide simple and efficient mechanism for the manufacture of boxes for blanks, and the features which are new with me will be best understood as described in connection with drawings, which illustrate a machine constructed in accordance with and embodying my improvements, and in which' Figure 1 is a side elevation of the said machine; Fi 2, a front elevation; Fig. 3, a plan view of t e carrier devices, taken as on the line 3 3 of Fig. 2. Fig. 4 is a rear elevation of the machine; Fig. 5, a side elevation of the mechanism for actuating the forming head or plunger, said mechanism being artly shown in section on the line 5 5 of ig. 4. Fig. 6 is a perspective view of the two sets of folding devices, which are an important feature of my invention, the view representing the chambers in which the folding devices are situated with the front walls removed. Fig. 7 is a sectional elevation through the cement-trough and cement-applying rollers, the section being a vertical one taken throu h the middle of the shaft carrying the rolls. Fig. 8 is a cross-sectional view taken as on the line 8 8 of Fig. 7. Fig. 9 is a plan view of the blank of the outer covering or case of the box. Figs. 10 to 13, inclusive, represent theaction of the head in connection with the folding devices of the upper set of such devices in folding a a er blank into the inner or lining box; and Figs. 14 to 16, inclusive, represent the action of the folding-head in connection with the folding devices of the second set in folding the outer blank into the form of-a box around the inner blank.

A indicates the frame of the machine, and B a vertical plate supported on and virtually forming part of the frame.

C is a bracket extending out in front of the plate B and forming the back face of the chamber or channel in which the upper set of folding devices are situated, 0 C indicating the lateral walls of this chamber and C the detachable front wall of the chamber, all fastened to the bracket C and having their upper faces fiush, as indicated at C and C, and provided with an aliningplate C blanks for the inner box being fed to the tubular surface C 0*, which thus constitute a blankholder, and alined against theplate C". I have indicated in Fig. 6 by' the symbol 0 the chamber or channel made up as above described and in which are situated the folding devices of the upper set of folding devices, these consisting, as shown, first of all, of the edges C", which serve to turn the ends of the inner blank up around the head, as shown in Fig. 10; second, in the folding-blades D D, which press the edges of the blank up against the edges of the head, as shown in Fig. 11; third, in the folding-blades D D, which turn one of the end flaps in, as indicated in Fig. 12, and, fourth, in the folding-blades D D, which turn the other flap in, as shown in Fi 13.

as shown in Fig. 6, indicates a plate forming a virtual prolongation of the bracket C, having simply t e function of guiding the inner box as it asses on its way to the second set of folding evices, which are situated directly in line with and, as shown, directly beneath the first set of folding de vices and are supported on a bracket E, which forms the inner wall of the chamber in which the second set of folding devices is situated and which, like the upper bracket C, supports side walls E E and a front wall E the-upper end of the bracket and attachedparts forming a table or blank-holder, (indicated at E E3) provided with alining-plates E for the introduction and alinement of the blank which is made into the outer cover or box The folding devices of the second 'set are made up, first of all, of the inner and outer edges E of the plates making up the chamber or channel E second, of the folder-. plates F F, which, as shown, are provided with extensions F F, which serve tosuport certain flaps of the partially-folded blank while cement is being applied to them;

TIC

third, in the folder-plates F F, and, fourth,

in the folder-plates F F from which extend ing-belts, situated below the folding devices.-

G is the forming and feeding head, preferably made inthe form of a plunger, as indicated, and moving, as shown, between grooved guide-rolls G and G the rear side of the plunger being provided with a rack G". The guide-walls G and G are supported on brackets H H, which also support a vertical plate H H, on which is pivoted a guidewheel H which rests against the back of the plunger, so as to hold the rack in contact with the actuating gear-segment I of a wheel I, which is secured on a shaft I to which shaft is also secured a wheel I and a gear-wheel I. The said gear-wheel I is in engagement with the rack J, moving in guideways J J secured on the plate B and connected, through a bracket J, with a connecting-rod J the end of which is pivotally connected with a crank-arm K. which is journaled on the end of a shaft K and posi tioned to be engaged by a projecting finger K on the disk K which is firmly secured to the shaft K, so as to rotate with it. Also secured to the shaft K is the chain-wheel K and the eccentric, (indicated at K.)

K and K are fast and loose pulleys on the shaft K.

Returning now to the shaft I, L is a belt or strap securedat one end to the wheel or drum I and at the other end secured to the plun er L, which moves in the cylinder L which said cylinder has at its lower end the valve L for permitting the free entrance of air and a restricted passage L for the exit of air.

M indicates the eccentric-strap on the eccentric K of the shaft K, the said strap connecting, through the endM of a rod M with a lever M M having an adjusting device (in dicated zit/M for adjusting the point of connection of the rod end M and having at its free end a pawl M, adapted to engage a ratchet-wheel N on the shaft N, said shaft having attached to it bevel-gears N N and a-belt-drum, (indicated at N The bevelgears actuate through bevels O O, the vertical shafts O O, to which are secured the lateral belt-wheels, (indicated at 0 0 P is the-lower belt, and P P the lateral upper belts, the upper surface of the lower belt being supported,as shown, (see Fig. 1,) on a guide-plate P and the lateral belts being preferably partly guided and supported on lateral plates P P, as shown in Figs. 2 and 3.

The sprocket or chain wheel K is connected, through a chain Q, with the sprocket or chain wheel Q, which is secured to the hollow shaft Q}, which supports the hollow cementing-wheels, (indicated at Q Q The shaft is supported on bearings R R extending up from the cement-trough R, between which is formed the steam-chamber R, which is in communication with the hollow shaft through the pipe connection R R indicating the steam connection leading from the other end of the shaft, and R the steam connection leading from the other end of the chamber R.

The inner blank, (indicated at S, see Figs. 10 to 13,) is first folded on the lines S S, then on'the lines S S then on the lines S S, and finally on the lines S S. The outer blank, the preferable construction of which is shown at T in Fig. 9 and of which the panel marked T forms the tpp and the panel marked t forms the bottom of the box, is first folded so that the panels T and T extend at right angles to the panel t. Then the flaps T T are folded up, as shown in Fig. 14, the flaps T T passing in front of the guide' plates F, which support them in front of openings E while the rollers Q apply cement to them. Then the side flaps T are folded, passing in front of the guide-plates F, which support them while the rollers Q a l): ply cement to them. Then the side flaps 8 are folded in, as shown in Fig. 1 5, and, finally, the flaps T are folded inward, as indicated in Fig. 16, enfolding 0f the flaps T T and T being left to be performed by handafter the receptacle is filled and ready for closure. It will be noticed that the flaps T and T are perforated, so that the cementing material applied to the flaps T v will pass through it into contact with the flaps T and through the perforations of the last-mentioned flaps into contact with the folded end of the inner lining or box, thus cementing all of these parts together and also to the end flaps T, which are folded down on the cemented flaps T The box thus constructed is a new one and forms the subject-matter of my. application for Letters Patent filed December 27, 1904, Serial No. 238,414.

In operation a plain blank is placed on the table C C and a properly cut and grooved blank T on the table E i, the forming-head being of course in its upper or retracted position. The driving-shaft K may be taken as in constant rotation, so that when the front end' of the projecting finger K of disk K engages the crank-arm K, which may be said to stand normally in an upright position, the said arm is rotated downward, carr 'ing with it the rack J, which by its engagement with the gear-wheel I on the shaft 1 rotates said shaft, so that the segmental rack I is also rotated and. through its engagement with the rack Gr forces the plunger, with its forming and feeding head on its end, through the two sets of forming devices, with the result of first forming the inner box or lining, as shown in Figs. 10 to 13, and then forming around said inner lining the outer box, as shown in Figs. 14to 16, The rotation of the shaft I through its wheel I draws up the bolt L and the plunger L to the position shown in Fig. 5, so that when the crank-arm K has passed the center line, or the position it occupies in Fig. 5, the weight of the plunger L will cause the shaft I to oscillate backward, with the result of rapidly retracting the plunger and bringing all parts to their normal starting position, this action being much quicker than that which would be caused by a direct connection with the driving-shaft, and the parts remaining inretracted position until the rotation of the drivingshaft again brings the plunger into contact with the arm K As shown, I have provided the cylinder L with an air-admission valve L and a restricted air-exit passage L so that the said cylinder, besides connecting the piston or plunger L, acts as a dashot to prevent destructive jar at the end of t e retracting stroke.

It will be "understood that the cement-applying wheels Q are in constant rotation in the heated cement-receptacle R and that the rolls are also heated by the steam which heats the receptacle. I have already described the manner in which these wheels apply cement to the flaps T of the blank T, and their action is fully illustrated in Fig. 8. The movement-of the belt-drums N O? 0 is efiected intermittently by the action of the eccentric K, which communicates an oscillatin motion to the shaft N, to which is directIy attached the belt-Wheel N the intermittent motion being communicated, through the bevel-gears M and O, to the shafts O O and the attached lateral belt-wheels.

It will be understood that the working stroke of the forming-head carries the completed boxes down between the lateral belts P P which grip the boxes sufficiently tightly to hold them a ainst the retracting movement of the head an the head being retracted carry themas indicated, for instance, in Figs. 1 and 3.

Having now described my invention, what I claim as-new, and desire to secure by Letters Patent, is-

1. In a box-forming machine, mechanism for forming a lined box from two blanks consisting of two sets of folding devices arranged in sequence and each having a blank-holder at its entrance end in combination with a forming and feeding head moving in a direct line and without rotation first, through one set of folding devices and then through the other set.

2. In a box-forming machine, mechanism for forming a lined box from two blanks con sisting of two sets of folding devices arranged in "sequence and each having a blank-holder I at its entrance end in combination with a then through the other set and means for applying cementing material to fla s of the second blank as it passes through t e second set of folding devices and before the cemented flaps are folded to place.

3. In a box-forming machine, mechanism for forming a lined box from two blanks consisting of two sets of folding devices arranged in sequence and each having a blanleholder at its entrance end in combination with a forming and feeding head adaptedto move first through one set of folding devices and then through the other set, supporting-plates arranged in the second set of folding devices to support unfolded flaps of the secondblank in unfolded position and means for ap lying cementing material arranged to app y cement to the flaps while so supported.

4. In a box-forming machine, mechanism for forming a lined box from two blanks consisting of two sets of folding devices arranged in sequence and each having a blank-holder at its entrance end in combination with a forming and feeding head adapted to move first through one set of folding devices and then through the other set, means for applying cementing material to flaps of the second blank as it passes through the second set of folding devices and before the cemented flaps are folded to place and carrier-belts arranged to receive the boxes as they are delivered from the folding devices and carry them away.

5. In a box-forming machine, mechanism for forming a lined box from two blanks consisting of two sets of folding devices arranged in sequence and each having a blank-holder at its entrance end in combination with a forming and feeding head adapted to move first through one set of folding devices and then through the other set, means for applying cementing material to flaps of the second blank as it passes through the second set of folding devices and before the cemented flaps are folded to place andintermittently-moving carrier-belts arranged to receive the boxes as they are delivered from the folding devices and carry them awa 6. In a box-forming mac ine, mechanism for forming a lined box from two blanks consisting of two sets of folding devices arranged in sequence and each having a blank-holder at its entrance end in combination with'a forming and feeding head adapted to move first through one set of folding devices and then through the other set, means for applying cementing material to flaps of the second blank as it passes through the second set of folding devices and before the cemented flaps are folded to place and carrier-belts P, P, arranged to receive the boxes as'they are delivered from the folding devices and carry them away and at the same time hold the folded flaps in position.

7. In a box-forming machine, mechanism for forming a lined box from two blanks consisting-of twosets of folding devices arranged I in sequenceand. each having a blank-holder at its entrance end in combination With-a reciprocating forming and feeding head adapted to move first through one set of foldin devices and then through the other setyan means for actuating said head wherebg it moves relatively slowly through the fol ing devices While acting on the blanks, is retra'cted swiftly and dwells iii-retracted position. i

' 8. In a box-forming-maehi-ne, the combination with folding devices and a reciproca't ing feedi ng and forming head ada ted to move through saidfolding devices, 0 means and piston L? L, said piston being connected to shaft 1 so as to be raised when the shaft 1 is rotated in a direction to move the formerhead through its Working stroke whereby the shaft is rotated in the o posite direction by the vacuum in the cylin er when free to, act, and means acting intermittently on the shaft P, to rotate it in a direction to move the former-head through its workin stroke.

JAMES H. MI OHELL. I Witnesses:

ARNOLD KATZ, D. STEWART. 

